scholarly journals Biomolecule-guided cation regulation for dendrite-free metal anodes

2020 ◽  
Vol 6 (32) ◽  
pp. eabb1342 ◽  
Author(s):  
Jian Zhi ◽  
Shengkai Li ◽  
Mei Han ◽  
P. Chen
Keyword(s):  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
High Loading ◽  
Regulation Mechanism ◽  
Redox Potentials ◽  
High Current ◽  
Collagen Hydrolysate ◽  
Glass Mat ◽  
Free Metal ◽  
Metal Anodes

Lithium (Li) or zinc (Zn) metal anodes have attracted interest for battery research due to their high theoretical capacities and low redox potentials. However, uncontrollable dendrite growth, especially under high current (>4 mA cm−2), precludes reversable cycling in Li or Zn metal batteries with a high-loading (>4 mAh cm−2), precludes reversable cycling in Li or Zn metal batteries with high-loading (>4 mAh cm−2) cathode. We report a cation regulation mechanism to address this failure. Collagen hydrolysate coated on absorbed glass mat (CH@AGM) can simultaneously induce a deionization shock inside the separator and spread cations on the anode to promote uniform electrodeposition. Employing 24 mAh cm−2 cathodes, Li and Zn metal batteries with CH@AGM delivered 600 cycles with a Coulombic efficiency of 99.7%. In comparison, pristine Li and Zn metal batteries only survive for 10 and 100 cycles, respectively. This approach enabled 400 cycles in a 200 Ah-class Zn metal battery, which suggests a scalable method to achieve dendrite-free anodes in various batteries.

scholarly journals Favorable Lithium Nucleation on Lithiophilic Framework Porphyrin for Dendrite-Free Lithium Metal Anodes

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Bo-Quan Li ◽  
Xiao-Ru Chen ◽  
Xiang Chen ◽  
Chang-Xin Zhao ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
Homogeneous Distribution ◽  
Electrochemical Performances ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Host Materials ◽  
Lithium Metal Anodes ◽  
Excellent Stability ◽  
Metal Anodes

Lithium metal constitutes promising anode materials but suffers from dendrite growth. Lithiophilic host materials are highly considered for achieving uniform lithium deposition. Precise construction of lithiophilic sites with desired structure and homogeneous distribution significantly promotes the lithiophilicity of lithium hosts but remains a great challenge. In this contribution, a framework porphyrin (POF) material with precisely constructed lithiophilic sites in regard to chemical structure and geometric position is employed as the lithium host to address the above issues for dendrite-free lithium metal anodes. The extraordinary lithiophilicity of POF even beyond lithium nuclei validated by DFT simulations and lithium nucleation overpotentials affords a novel mechanism of favorable lithium nucleation to facilitate uniform nucleation and inhibit dendrite growth. Consequently, POF-based anodes demonstrate superior electrochemical performances with high Coulombic efficiency over 98%, reduced average voltage hysteresis, and excellent stability for 300 cycles at 1.0 mA cm−2, 1.0 mAh cm−2 superior to both Cu and graphene anodes. The favorable lithium nucleation mechanism on POF materials inspires further investigation of lithiophilic electrochemistry and development of lithium metal batteries.

Ultra-long-life and highly reversible Zn metal anodes enabled by a desolvation and deanionization interface layer

2021 ◽  
Author(s):  
Xiaotan Zhang ◽  
Jiangxu Li ◽  
Dongyan Liu ◽  
Mengke Liu ◽  
Tiansheng Zhou ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Interface Layer ◽  
Zinc Ion ◽  
Dendrite Growth ◽  
Metal Anode ◽  
Zinc Metal ◽  
Long Life ◽  
Limited Lifespan ◽  
Metal Anodes

Zinc metal anode in aqueous zinc-ion batteries (AZIBs) is considerably impeded by uncontrollable dendrite growth and intricately water-induced corrosion, leading to low Coulombic efficiency (CE) and limited lifespan. Herein, a...

scholarly journals Favorable Lithium Nucleation on Lithiophilic Framework Porphyrin for Dendrite-Free Lithium Metal Anodes

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Bo-Quan Li ◽  
Xiao-Ru Chen ◽  
Xiang Chen ◽  
Chang-Xin Zhao ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
Homogeneous Distribution ◽  
Electrochemical Performances ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Host Materials ◽  
Lithium Metal Anodes ◽  
Excellent Stability ◽  
Metal Anodes

Lithium metal constitutes promising anode materials but suffers from dendrite growth. Lithiophilic host materials are highly considered for achieving uniform lithium deposition. Precise construction of lithiophilic sites with desired structure and homogeneous distribution significantly promotes the lithiophilicity of lithium hosts but remains a great challenge. In this contribution, a framework porphyrin (POF) material with precisely constructed lithiophilic sites in regard to chemical structure and geometric position is employed as the lithium host to address the above issues for dendrite-free lithium metal anodes. The extraordinary lithiophilicity of POF even beyond lithium nuclei validated by DFT simulations and lithium nucleation overpotentials affords a novel mechanism of favorable lithium nucleation to facilitate uniform nucleation and inhibit dendrite growth. Consequently, POF-based anodes demonstrate superior electrochemical performances with high Coulombic efficiency over 98%, reduced average voltage hysteresis, and excellent stability for 300 cycles at 1.0 mA cm−2, 1.0 mAh cm−2 superior to both Cu and graphene anodes. The favorable lithium nucleation mechanism on POF materials inspires further investigation of lithiophilic electrochemistry and development of lithium metal batteries.

A 3D mixed ion/electron conducting scaffold by in-situ conversion for long-life lithium metal anodes

Nanoscale ◽  
2021 ◽  
Author(s):  
Huai Jiang ◽  
Qingyuan Dong ◽  
Maohui Bai ◽  
Furong Qin ◽  
Maoyi Yi ◽  
...  
Keyword(s):  
Anode Material ◽  
Volume Change ◽  
Specific Energy ◽  
Dendrite Growth ◽  
Commercial Application ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Long Life ◽  
Metal Anodes

Lithium (Li) metal is widely considered as the most promising anode material because of ultrahigh specific energy. However, obvious volume change and uncontrollable dendrite growth hinder its commercial application. Herein,...

A Self-Preserving Pitted Texture Enables Reversible Topographic Evolution and Cycling on Zn Metal Anodes

2021 ◽  
Author(s):  
Yuanlin Xu ◽  
Chen Wang ◽  
Yu Shi ◽  
Guoxing Miao ◽  
Jing Fu ◽  
...  
Keyword(s):  
Dendrite Growth ◽  
Anode Surface ◽  
Zn Anode ◽  
Topographic Evolution ◽  
Irreversible Evolution ◽  
Metal Anodes

We identify that the irreversible evolution of flat to nonuniform topography on the pristine Zn anode surface during the repeated stripping/plating cycles triggers the fatal dendrite growth. Given this, a...

In-situ coating of lithiophilic interphase on a biporous Cu scaffold with vertical microchannels for dendrite-free Li metal batteries

2021 ◽  
Author(s):  
Li-Min Wang ◽  
Xiaokuan Ban ◽  
Zongzi Jin ◽  
Ranran Peng ◽  
Chusheng Chen ◽  
...  
Keyword(s):  
Volume Change ◽  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
Porous Scaffolds ◽  
Effective Strategy ◽  
Practical Application ◽  
Metal Anode ◽  
Li Metal Anode ◽  
In Situ Coating

Severe dendrite growth, low Coulombic efficiency and huge volume change have impeded the practical application of Li metal anode, and the construction of porous scaffolds is an effective strategy to...

The dendrite growth in 3D structured lithium metal anodes: Electron or ion transfer limitation?

2019 ◽  
Vol 23 ◽  
pp. 556-565 ◽  
Author(s):  
Rui Zhang ◽  
Xin Shen ◽  
Xin-Bing Cheng ◽  
Qiang Zhang
Keyword(s):  
Dendrite Growth ◽  
Ion Transfer ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Metal Anodes

scholarly journals Electrolyte screening studies for Li metal batteries

2020 ◽  
Vol 56 (79) ◽  
pp. 11883-11886
Author(s):  
Jeesoo Seok ◽  
Na Zhang ◽  
Burak Ulgut ◽  
Aihua Jin ◽  
Seung-Ho Yu ◽  
...  
Keyword(s):  
Cycling Performance ◽  
High Current ◽  
Current Densities ◽  
Metal Anodes

From 60 solvent electrolyte combinations tested, we find that Li metal anodes, tested in 1 M LiFSI in DOL:DME exhibit an outstanding cycling performance (>500 cycles) even at high current densities (3 mA cm−2).

scholarly journals Beyond cell parameters: Exploiting cell operation towards optimizing the SEI and suppressing dendrite growth on lithium metal anodes

2020 ◽  
Vol 2 (5) ◽  
Author(s):  
Daisy Patino ◽  
Bo Dong ◽  
Fabian Villalobos ◽  
Steven Herrera ◽  
Jeffrey Bell ◽  
...  
Keyword(s):  
Dendrite Growth ◽  
Lithium Metal ◽  
Cell Parameters ◽  
Lithium Metal Anodes ◽  
Metal Anodes

scholarly journals Designing electrolytes with polymerlike glass-forming properties and fast ion transport at low temperatures

2020 ◽  
Vol 117 (42) ◽  
pp. 26053-26060
Author(s):  
Qing Zhao ◽  
Xiaotun Liu ◽  
Jingxu Zheng ◽  
Yue Deng ◽  
Alexander Warren ◽  
...  
Keyword(s):  
Ion Transport ◽  
Lithium Iron Phosphate ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Ionic Conductivities ◽  
Iron Phosphate ◽  
Cyclic Ether ◽  
Activation Entropy ◽  
Metal Electrodes ◽  
Metal Anodes

In the presence of Lewis acid salts, the cyclic ether, dioxolane (DOL), is known to undergo ring-opening polymerization inside electrochemical cells to form solid-state polymer batteries with good interfacial charge-transport properties. Here we report that LiNO3, which is unable to ring-open DOL, possesses a previously unknown ability to coordinate with and strain DOL molecules in bulk liquids, completely arresting their crystallization. The strained DOL electrolytes exhibit physical properties analogous to amorphous polymers, including a prominent glass transition, elevated moduli, and low activation entropy for ion transport, but manifest unusually high, liquidlike ionic conductivities (e.g., 1 mS/cm) at temperatures as low as −50 °C. Systematic electrochemical studies reveal that the electrolytes also promote reversible cycling of Li metal anodes with high Coulombic efficiency (CE) on both conventional planar substrates (1 mAh/cm2over 1,000 cycles with 99.1% CE; 3 mAh/cm2over 300 cycles with 99.2% CE) and unconventional, nonplanar/three-dimensional (3D) substrates (10 mAh/cm2over 100 cycles with 99.3% CE). Our finding that LiNO3promotes reversibility of Li metal electrodes in liquid DOL electrolytes by a physical mechanism provides a possible solution to a long-standing puzzle in the field about the versatility of LiNO3salt additives for enhancing reversibility of Li metal electrodes in essentially any aprotic liquid electrolyte solvent. As a first step toward understanding practical benefits of these findings, we create functional Li||lithium iron phosphate (LFP) batteries in which LFP cathodes with high capacity (5 to 10 mAh/cm2) are paired with thin (50 μm) lithium metal anodes, and investigate their galvanostatic electrochemical cycling behaviors.

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